Turn the project into a Play Framework project

Sources were moved to the default Play directories 'app' and 'test' at the
project root level.
Add default Play dependencies
Get "/" runs the Main object main method

The default Play templates and assets are used to render the page.
Get "/game" returns the latest game replay

The client-server separation no longer exists, moved client side files to
appropriate directories on the server.
Move all files from the server directory to root
Remove extra 'scala' directory from source code paths
Use app directory for resources now
Merge branch 'play-framework'